California Water Service Group (CWT) Operating Margin (2009 - 2026)
California Water Service (CWT) recorded Operating Margin of 22.97% in Q2 2026, up 3.42 percentage points from 19.55% a year earlier and up 14.51 percentage points from the prior quarter.
Powered by 
Analysis
California Water Service Group (CWT) Operating Margin (2009 - 2026) Analysis & Trends
On a TTM basis, California Water Service's Operating Margin came in at 17.57% as of Jun 30, 2026, up 0.09 percentage points year-over-year; for FY2025, it came in at 17.03%, down 4.67 percentage points from FY2024.
- Annual Operating Margin has a five-year change of -0.17 percentage points (FY2020 to FY2025).
- Across earlier years, Operating Margin came in at 21.71% in FY2024 (+12.00 pp), 9.71% in FY2023 (-5.38 pp), 15.08% in FY2022 (-0.95 pp) and 16.03% in FY2021 (-1.18 pp).
- The Q2 2026 figure is the highest quarterly Operating Margin since Q1 2024.
- On a year-over-year basis, Operating Margin rose in three of the last eight quarters, with an average year-over-year change of -2.02 percentage points.
- Peak year-over-year performance for Operating Margin in the last five years was a gain of 42.14 percentage points in Q1 2024, against a drop of 18.65 percentage points in Q1 2023 at the low end.
- Per Business Quant, the preceding three quarters came in at 8.47% (Q1 2026), 11.64% (Q4 2025) and 22.69% (Q3 2025).
Peer Set
Peer Comparison
Historic Data
Download Data
Historic Data
| Date | Value |
|---|---|
| Jun 30, 2026 | 22.97% |
| Mar 31, 2026 | 8.47% |
| Dec 31, 2025 | 11.64% |
| Sep 30, 2025 | 22.69% |
| Jun 30, 2025 | 19.55% |
| Mar 31, 2025 | 10.95% |
| Dec 31, 2024 | 14.51% |
| Sep 30, 2024 | 22.28% |
| Jun 30, 2024 | 19.72% |
| Mar 31, 2024 | 28.77% |
| Dec 31, 2023 | 16.43% |
| Sep 30, 2023 | 17.05% |
| Jun 30, 2023 | 8.22% |
| Mar 31, 2023 | -13.37% |
| Dec 31, 2022 | 13.08% |
| Sep 30, 2022 | 24.39% |
| Jun 30, 2022 | 13.23% |
| Mar 31, 2022 | 5.28% |
| Dec 31, 2021 | 6.03% |
| Sep 30, 2021 | 27.72% |
API Access
California Water Service Group Operating Margin API
Pull this series into your own models, spreadsheets and apps with the Business Quant
Historical Metrics API. The request below matches the chart above — change the
frequency, period or values and it follows. Swap YOUR_API_KEY for your own key.
https://data.businessquant.com/historic?slug=operating-margin&ticker=CWT&period=max&api_key=YOUR_API_KEYimport requests
url = "https://data.businessquant.com/historic"
params = {"slug": "operating-margin", "ticker": "CWT", "period": "max", "api_key": "YOUR_API_KEY"}
data = requests.get(url, params=params).json()const res = await fetch("https://data.businessquant.com/historic?slug=operating-margin&ticker=CWT&period=max&api_key=YOUR_API_KEY");
const data = await res.json();